Inventor
David F. Witman
Inventor
Pleasantville, NY, US
Overview
Patents· 13 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G03Fprimary
G03FPhotomechanical production of textured or patterned surfaces, e.g. for printing, for processing of semiconductor devices43%
H05KPrinted circuits13%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests13%
Y10TTechnical subjects covered by former us classification13%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h109%
G02BOptical elements, systems or apparatus4%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h104%
PatentTitleYear
5,534,094'Method for fabricating multi-layer thin film structure having a separation layer'19965,286,599'Base developable negative photoresist composition and use thereof'19945,258,236'Multi-layer thin film structure and parallel processing method for fabricating same'19935,238,773'Alkaline developable photoresist composition containing radiation sensitive organosilicon compound with quinone diazide terminal groups'19935,115,095'Epoxy functional organosilicon polymer'19925,110,711'Method for forming a pattern'19925,098,816'Method for forming a pattern of a photoresist'19925,059,512'Ultraviolet light sensitive photoinitiator compositions, use thereof and radiation sensitive compositions'19914,981,909'Plasma-resistant polymeric material, preparation thereof, and use thereof'19914,840,923'Simultaneous multiple level interconnection process'19894,782,008'Plasma-resistant polymeric material, preparation thereof, and use thereof'19884,770,947'Multiple density mask and fabrication thereof'19884,744,615'Laser beam homogenizer'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–1996Patents assigned to IBM (13)· patent assignee history
1988–1996Based in Pleasantville, NY, US· patent location history
1988–1991Based in Ossining, NY, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| IBM | 13 | 1988–1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Pleasantville, New York, US | 10 | 1988–1996 |
| Ossining, New York, US | 3 | 1988–1991 |